Question about Fedders A3X05F2A Air Conditioner

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Not cool enough, compared to new one

Need to add coolant to recharge systen. I have not opened it yet. Where is the nozzel for charging? I have no tech manual on system.

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There is no nozzle to charge a window air conditioner. They are shipped from the factory as a hermetically sealed system. Befor getting into the sealed system there are some check points to do first. Check and make sure you have an even air flow across the condenser. That is the outside part of the unit. If you cant feel much air flow the condenser may need to be cleaned. The sealed system should not be worked on by someone who is not citified for that type of work.

Posted on Jul 11, 2008

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Ive put new thermostate and water pump on so why is it still running hot

Dear Tammy,

Be sure to take all Safety Precautions because Hot Coolant can cause bad burn injuries and / or Death.

DO NOT open the Cooling system while the truck is HOT. Better be SAFE than Sorry.

  • There are probably an air pocket sitting right on the new thermostat preventing it to open and let coolant thru.

  • You need to Bleed the system and keep the Coolant/Antifreeze at proper level. Some manufacturers have a bleeding screw or valve to the system

  • .Otherwise unscrew the hose at the thermostat a LITLLE just enough to let the air bubbles OUT and then tighten it right back. Add coolant to the tank or radiator as needed.

  • Last but not least Check for Leaks.

Best of Luck,


Jul 04, 2015 | GMC 2005 Canyon SLE

1 Answer

Air conditioner.

If its a mini split/ductless split its worth calling a tech. You can't buy freon legally unless you have an epa license. Also the minisplits are a bit complicated so experience is great! But.... It should be betwee 78°-95° outdoors. There is only 1 charging port. At the copper lineset that connects to the o.d. unit there should be a shraeder valve. Remove the cap, connect toyour low side port from your low side of your guages. Hook up your middle hose from your guages to the drum of freon, probably R-410-a, and open the valve on the drum. Both handles on the guages should be closed/seated. Slightly open the middle hose at the gauges by unscrewing it just a little for 3-4 seconds to bleed any air in the hose and then close it. Do the same on the low side hose for about 1 second. Turn the drum of freon over/upside down or follow the freons' charging instructions(should be on the drum/can). Using a clamp on amp meter, clamp on to the compressors common wire. Verify your compressors RLA (max amperage while operating) Turn on the cooling at the t-stat/remote to its lowest set temp. Wait 7-10 minutes. The unit should have started and operating if not you cant charge it until it has started atempting to cool. If the rla is very near its rated rla it don't need freon. If its low on freon the rla will be low. Open low side port on guages for 2-3 seconds and then close. Wait 5-7 mins. You should hear the compressor increase in speed and rla will increase also on your amp meter. This should be repeated until the rla is near the rated rla on the data plate/sticker/sheet. After charging close all valves that are open and qhickly remove hose from shraeder valve. The best way is to weigh the freon in! Or to have someone (technician) locate the leak and replace or repair. R-410a freon is a blend of freons and a leaking system will loose efficiency after recharged a few times. I can't stress enough when it comes to allowing a professional work on HVAC equipment due to the fact that most freons have an ozone depletion potential and these machine have high voltage as well as capacitors that hold a higher voltage and can release when any wire is touched at a terminal. Be safe!!!

Jun 17, 2015 | Fujitsu Heating & Cooling

2 Answers

Need Recharge?

Make sure your AC is set to cool and not dehumidify . If yes try lowering the temperature , if still no cooling then yes you probably nee to recharge

May 24, 2013 | Panasonic CW-XC143EU Air Conditioner

1 Answer

When my car need coolant do I have to add it to the coolant recovery tank and the radiator

Both, I recomend you add the coolant to the radiator untill it tops off, with the car on, and then add to the recovery tank untill the fill line. NOTE: ensure the engine is not hot before removing the radiator cap, if it was running let it cool for a while before opening it and if you add cold coolant to a very hot engine the engine block can crack.

Mar 01, 2011 | Heating & Cooling

1 Answer

Dometic roof top rv airconditioner is not pulling any water out of the air based on condensate run-off. Is this a sign of low coolant? If so - are these types of air conditioners equiped to be re-charged...

The system is not equipped to be recharged. However there are several options to add a service port to the system. If you are staying cool there is probably no need to add refrigerant.

Jul 10, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a Dometic Duo Therm rv Roof Air Conditioner Model# 59516.531.The fan is blowing and the compressor is kicking on but it is not blowing out cold air. Someone said it must be out of freon. Why would...

These are a closed system.(meaning that there is no fill valves for recharging) But a heating & cooling technician can solder them on and re-charge the system. Only problem there is to get an estimate up front, and compare it to buying a new roof unit which also comes with a new warranty, as well as keep in mind that the freon went somewhere, so there is an obvious leak that will need to be addressed as well. Most times it's wiser and cheaper in long run just to buy a new roof unit.
Are you sure that the compressor is kicking in? Did anyone remove cover on roof and check lines from compressor to see if any cooling is occurring?
These don't often leak, that's why I'm asking. Any idea how old the unit is?
Perhaps in fairly new, it's a warranty issue.

Jun 25, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Do you add coolant to these units if they quit cooling?

Hello my name is Heath it will be my pleasure to assist you. If you have to add refrigerant then there is a leak in the unit and it would have to be leak check fixed evacuated and then recharged.

Jun 13, 2010 | GE APN10AA Portable Air Conditioner

1 Answer

Rv air conditoner turns on but will not cool air. the themostate works good when heat is turn on no problems. the air conditioner acts as if there is no coolant, or maybe not enough. if it were an...

RV air conditioners are a closed system. A Refrigeration mechanic can install valves and re-charge it, but by the time you pay for that, it may be smarter to just replace the unit.You say it's turning on, but do you actually hear the "hum" or "moan" of the compressor kicking in, or is it just that fan coming on?

Apr 19, 2010 | Heating & Cooling

1 Answer

When do you know to add coolent to a central cooling unit

You dont add coolant to centrl air systems. They have to be charged with the appropriate refrigerant by an EPA certified technician. If the unit seems to not be cooling sufficiently that would be your sign to call someone. this is generally an item checked on an annually cooling heating inspection and tune up. Unless the unit is very old or leaking refrigerant somewhere there really shouldn't be an issue since it is a closed system. Be sure you need a recharge before asking for one, it is not cheap by any means, depending on the type of refrigerant it can run you anywhere from 25-55 dollars per pound and the typical system takes 6-10 pounds to charge fully.

Jun 17, 2009 | Samsung AW0603B Air Conditioner

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